Practice 1 的第25题
是图表题组的一题，原图: http://ppt.cc/ajI3
25. In 1993 the average (arithmetic mean) price per card for all greeting
cardssold was $1.25. For which of the following occasions was the number
of cards sold in 1993 less than the total number of cards sold that year
for occasions other than the ten occasions shown?
Indicate all such occasions.
A Christmas
B Valentien's Day
C Easter
D Mother's Day
E Father's Day
F Graduation
G Thanksgiving
H Halloween Ans: CDEFGH
主要是题目标黄色那句我怎么看都看不懂...虽然看说明知道他在问什么，
但是还是没有办法理解这句话的结构，有请各位板友解答m(_ _)m